my phone is showing as not activated after downgrade what did i do

[brendans90]

i downgraded from 4.3.5 to 4.1 using tu, redsnow and itunes. i used redsnow to get into dfu mode, ran tu, then restored to custom firmware 4.1 made with snowbreeze, it all went well til my phone showed me as not on a carrier and no 3g. now i have no contacts and no way of figuring this out! help! please

[iYeow]

Are you with official carrier for your iphone ?

Go check your baseband : setting : general : about : modem firmware